1.

When_the_two_elements_of_a_pair_have_a_surface_contact_when_relative_motion_takes_place_and_the_surface_of_one_element_slides_over_the_surface_of_the_other,_the_pair_formed_is_known_as_a$

A. lower pair
B. higher pair
C. self-closed pair
D. force-closed pair
Answer» B. higher pair


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